Error 0x800488FE — Error logging into Microsoft account during Office activation

Error 0x800488FE: Microsoft account sign-in error during Office activation

This error occurs in: Microsoft 365, Office 2021.

Cause

Unable to sign in to Microsoft account during Office activation. This may be caused by incorrect login credentials, network issues, or temporary service unavailability.

Symptoms

• During activation, the following message appears: "Microsoft account sign-in failed during Office activation"
• Error code: 0x800488FE
• English version: "Microsoft account sign-in failed"

Step-by-step solution

Check your Microsoft account password on account.microsoft.com. Log out and log back in to Office. Verify that the email address is correct.

Solution for Office

1. Open any Office application (Word, Excel)
2. File → Account → Change product key
3. Enter the key from KluczeSoft
4. Click Activate

Alternatively, through the command line:

cd "C:\Program Files\Microsoft Office\Office16"
cscript ospp.vbs /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
cscript ospp.vbs /act

Verification

After performing the steps, check if the activation was successful:

• Office: File → Account → Status: "Product activated"
• Or: cscript ospp.vbs /dstatus

Still not working?

If the above steps did not help:

1. Check the date and time — they must be correct (an incorrect date may block activation)
2. Temporarily disable antivirus and try again
3. Check your internet connection — online activation requires a connection to Microsoft servers
4. Contact us:
   • Email: [email protected]
   • Phone: 00 800 121 1654 (toll-free)
   • Help center: pomoc.kluczesoft.pl